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Isolated crystals are rare, but orthopyroxene is an essential constituent of various types of [[igneous rock]]s and [[metamorphic rock]]s. Magnesian orthopyroxene occurs in [[Intrusion (geology)|plutonic]] rocks such as [[gabbro]] (norite) and [[diorite]]. It may form small idiomorphic phenocrysts and also groundmass grains in volcanic rocks such as [[basalt]], [[andesite]], and [[dacite]]. |
Isolated crystals are rare, but orthopyroxene is an essential constituent of various types of [[igneous rock]]s and [[metamorphic rock]]s. Magnesian orthopyroxene occurs in [[Intrusion (geology)|plutonic]] rocks such as [[gabbro]] (norite) and [[diorite]]. It may form small idiomorphic phenocrysts and also groundmass grains in volcanic rocks such as [[basalt]], [[andesite]], and [[dacite]]. |
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Enstatite, close to En<sub>90</sub>Fs<sub>10</sub> in composition, is an essential mineral in typical [[peridotite]] and [[pyroxenite]] of the [[Earth's mantle]]. [[Xenolith]]s of peridotite are common in [[kimberlite]] and in some basalt. Measurements of the [[calcium]], [[aluminum]], and [[chromium]] contents of enstatite in these xenoliths have been crucial in reconstructing the depths from which the xenoliths were plucked by the ascending magmas. |
Enstatite, close to En<sub>90</sub>Fs<sub>10</sub> in composition, is an essential mineral in typical [[peridotite]] and [[pyroxenite]] of the [[Earth's mantle]]. [[Xenolith]]s of peridotite are common in [[kimberlite]] and in some [[basalt]]. Measurements of the [[calcium]], [[aluminum]], and [[chromium]] contents of enstatite in these xenoliths have been crucial in reconstructing the depths from which the xenoliths were plucked by the ascending magmas. |
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Orthopyroxene is an important constituent of some metamorphic rocks such as [[granulite]]. Orthopyroxene near pure enstatite in composition occurs in some metamorphosed [[serpentine group|serpentine]]s. Large crystals, a foot in length and mostly altered to [[steatite]], were found in 1874 in the [[apatite]] veins traversing [[mica]]-[[schist]] and [[hornblende]]-schist at the apatite mine of Kjørstad, near [[Brevik, Norway|Brevik]] in southern [[Norway]].<ref name="EB1911"/> |
Orthopyroxene is an important constituent of some metamorphic rocks such as [[granulite]]. Orthopyroxene near pure enstatite in composition occurs in some metamorphosed [[serpentine group|serpentine]]s. Large crystals, a foot in length and mostly altered to [[steatite]], were found in 1874 in the [[apatite]] veins traversing [[mica]]-[[schist]] and [[hornblende]]-schist at the apatite mine of Kjørstad, near [[Brevik, Norway|Brevik]] in southern [[Norway]].<ref name="EB1911"/> |
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Latin: A a Á á À à  â Ä ä Ǎ ǎ Ă ă Ā ā à ã Å å Ą ą Æ æ Ǣ ǣ B b C c Ć ć Ċ ċ Ĉ ĉ Č č Ç ç D d Ď ď Đ đ Ḍ ḍ Ð ð E e É é È è Ė ė Ê ê Ë ë Ě ě Ĕ ĕ Ē ē Ẽ ẽ Ę ę Ẹ ẹ Ɛ ɛ Ǝ ǝ Ə ə F f G g Ġ ġ Ĝ ĝ Ğ ğ Ģ ģ H h Ĥ ĥ Ħ ħ Ḥ ḥ I i İ ı Í í Ì ì Î î Ï ï Ǐ ǐ Ĭ ĭ Ī ī Ĩ ĩ Į į Ị ị J j Ĵ ĵ K k Ķ ķ L l Ĺ ĺ Ŀ ŀ Ľ ľ Ļ ļ Ł ł Ḷ ḷ Ḹ ḹ M m Ṃ ṃ N n Ń ń Ň ň Ñ ñ Ņ ņ Ṇ ṇ Ŋ ŋ O o Ó ó Ò ò Ô ô Ö ö Ǒ ǒ Ŏ ŏ Ō ō Õ õ Ǫ ǫ Ọ ọ Ő ő Ø ø Œ œ Ɔ ɔ P p Q q R r Ŕ ŕ Ř ř Ŗ ŗ Ṛ ṛ Ṝ ṝ S s Ś ś Ŝ ŝ Š š Ş ş Ș ș Ṣ ṣ ß T t Ť ť Ţ ţ Ț ț Ṭ ṭ Þ þ U u Ú ú Ù ù Û û Ü ü Ǔ ǔ Ŭ ŭ Ū ū Ũ ũ Ů ů Ų ų Ụ ụ Ű ű Ǘ ǘ Ǜ ǜ Ǚ ǚ Ǖ ǖ V v W w Ŵ ŵ X x Y y Ý ý Ŷ ŷ Ÿ ÿ Ỹ ỹ Ȳ ȳ Z z Ź ź Ż ż Ž ž ß Ð ð Þ þ Ŋ ŋ Ə ə
Greek: Ά ά Έ έ Ή ή Ί ί Ό ό Ύ ύ Ώ ώ Α α Β β Γ γ Δ δ Ε ε Ζ ζ Η η Θ θ Ι ι Κ κ Λ λ Μ μ Ν ν Ξ ξ Ο ο Π π Ρ ρ Σ σ ς Τ τ Υ υ Φ φ Χ χ Ψ ψ Ω ω {{Polytonic|}}
Cyrillic: А а Б б В в Г г Ґ ґ Ѓ ѓ Д д Ђ ђ Е е Ё ё Є є Ж ж З з Ѕ ѕ И и І і Ї ї Й й Ј ј К к Ќ ќ Л л Љ љ М м Н н Њ њ О о П п Р р С с Т т Ћ ћ У у Ў ў Ф ф Х х Ц ц Ч ч Џ џ Ш ш Щ щ Ъ ъ Ы ы Ь ь Э э Ю ю Я я ́
IPA: t̪ d̪ ʈ ɖ ɟ ɡ ɢ ʡ ʔ ɸ β θ ð ʃ ʒ ɕ ʑ ʂ ʐ ç ʝ ɣ χ ʁ ħ ʕ ʜ ʢ ɦ ɱ ɳ ɲ ŋ ɴ ʋ ɹ ɻ ɰ ʙ ⱱ ʀ ɾ ɽ ɫ ɬ ɮ ɺ ɭ ʎ ʟ ɥ ʍ ɧ ʼ ɓ ɗ ʄ ɠ ʛ ʘ ǀ ǃ ǂ ǁ ɨ ʉ ɯ ɪ ʏ ʊ ø ɘ ɵ ɤ ə ɚ ɛ œ ɜ ɝ ɞ ʌ ɔ æ ɐ ɶ ɑ ɒ ʰ ʱ ʷ ʲ ˠ ˤ ⁿ ˡ ˈ ˌ ː ˑ ̪ {{IPA|}}
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